Shock-absorber.



G. BANK.

SHOCK ABSORBER.

APPLIOATION FILED 00116.(1998.

93 1,67 1 Patented Aug. 1'?, 1909.

2 SHEETS-SHEET l.

G. BANK.

SHOCK ABSORBEB.

APPLICATION FILED 00T.16. 1908.

931,671.- Patented Aug. 17,1909.

2 SHEETS-SHEET 21 vll/111111111111911(,llill/lill ANDREW. s. GRAHAM ou.,FI-lofcuumoonnnms. iNAsmNGToN. n4 c GUSTAV BANK, OF BUFFALO, NEW YORK.

SIOCK-ABSORBER.

Specification of Letters Patent.

Patented Aug. 17, 1909.

Application filed October 16, 1908. Serial No. 458,138.

To all whom it may concern:

Zen of the United States, residing at Buffalo, in the county of Erie andState of New York, have invented cer ain new and useful Improvements inShock-Absorbers; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to improvements in shock absorbers, and is designedfor use with hand hammers, riveters, drills, chisels, picks, and allsimilar tools doing their work by repeated impact into or upon thematerial under the operator-s hand. Such tools receive their po verdirectly or indirectly from any mechanism which may be operated bycompressed air, steam, electricity or any other motive power.

The object of my invention is to provide a simple device by which theshock to the workman, under the repeated action of the tool, will beminimized.

With this object in view, my invention consists in the construction andcombinations of parts as hereinafter described and claimed.

In the accompanying drawingsFigure 1is a longitudinal section showing adrill, or similar tool, with my invention applied thereto. Fig. 2 is across section of the same. Fig. 3 is a longitudinal section of amodified form of the shock absorber. Fig. 4 is a cross section of thesame. Fig. 5 is a longitudinal section showing the invention applied toa chisel operated by a pneumatic hand -hammer. Fig. 6 is a view of apneumatic hand hammer with the invention applied thereto, and shown insection. Fig. 7 is a view of a pneumatic riveter showing my inventionapplied to the striking end. Fig. 8 is a view of a pneumatic riveterwith the invention applied to the pistol grip thereof. Fig. 9 is a crosssection of a modified `form of the casing of my invention. Figs. 10 and11 show, in side elevation, washers adapted to fit in the casing shownin Fig. 9. Fig. 12 is a longitudinal section of still another modiedform of the casing. Figs. 13 and 14C show, in side elevation, washersadapted to be used with the casing shown in Fig. 12. Figs. 15 and 16show sleeves adapted to be used with either of the casings shown inFigs. 9 and 1Q. Figs. 17 and 18 show, in end elevation. modified shapesVof casing, and Figs. 19, Q0,

Be it known that I, Gns'riiv BANK, a citi- 21 and 22, show various formsof sleeves, and wedges or fillers adapted to be used with differentforms of the casing. In Figs. 5, 6, 7 and 8 the recoil spring has beenomitted.

Referring to Figs. 1 and 2, a represents the shank of a chisel, drill,or similar tool, driven by pover in any suitable manner. l) represents ahollow casing having a perforated head o tapered on the outside. Thishead may be made integral with the main casing or may be attachedthereto, as desired. liy having it attached thereto or by using wedgesor fillers, such as shown by Figs. 10, 11, 13, 1-1; etc., tools ofdifferent sizes or shapes may be used for the same casing. The oi'itsideof the casing Z) is pref erably knurled or roughened so that the workmanmay grip it firmly, or in case of large tools it may be provided withhandles. rlhc upper part of the easing is provided with an ellipticalopening d. e represents a sleeve which is adapted to slide freely withinthe casing L, and is of a size and shape to exactly fit the shank a ofthe tool. represents a screw provided with a head g, or if desired anordinary screw head may be used. 7L represents a washer located betweenthe head of the screw and the sleeve e. This sleeve and the washer 7Lare provided with screw-threaded perforations through which the screwpasses, and the shank e of the tool is preferably provided with a slightdepression into which the end of the screw f rits. By turning this screwhome, therefore', it will be seen that the shank a, sleeve e, washer 7Land screw f are firmly fastened together and move as one piece. t'represents a coiled spring held in position between the part c and thesleeve e. The operation of this forni of device is as follows ,-Theworkman holds the casing b firmly in his hand, and as the shank a isrepeatedly and rapidly Operated the sleeve c is forced against thespring t', thereby absorbing the shock, the washer 7L moving in theperforation (Z meanwhile. The shock of the blow upon the tool istherefore partially taken up by the spring c' and not directlycommunicated to the hand of the operator. y

In the forms shown in Figs. 3 and 11, the construction is just the same,except that instead of the washer L a perforated roller is used, theoperation being the same in each instance.

In Fig. 5, the principle of the operation is the same, but the shank aof the tool is hollowed out to receive a short tool 7a removably held inplace by a set screw which may be of any desired shape. n represents thereciprocating hammer for delivering blows on the tool shank a.

Referring to Fig. G, 0 represents the outside shell of a small pneumatichand hammer with my invention as applied thereto.

In Fig. of a pneumatic riveter provided with a pistol grip y, and havingmy invention applied to the striking end.

In Fig. S, 7' represents the shell of a pneumatic rive'ter, or handhammer, having a 'pistol grip s, with my invention applied to said grip.In many instances it is desirable to have the shock absorber vappliedboth to the striking end and to the pistol grip.

In Fig. 9, is represented a modified form of a easing, in that the end cis provided with shoulders, as shown at z5, into which washers u and aare adapted to lit, these washers having' perforations of differentsizes and shapes therein.

In Fig. l2, the end c2 of the casing is provided with a pluralityof-shoulders t into which stepped washers u2 and 'r1.3 fit, said washersbeing provided with perforations of different sizes and shapes.

The casing, which is to be held by the operator-s hand, may be maderound or of any desired shape, as shown for example in Figs. 17 and 1S,and the washers fitting into said casing are, of course, shapedon theoutside to .lit into. said casing, and are provided with perforations ofany desired shape, such as round, square, hexagonal, or any desiredshape, as indicated in Figs. 19 and 22.

I claim z* l. The combination with a power driven tool, of a shockabsorber therefor consisting of a casing adapted to surround said tool7, j) represents the outside shell.

m, and

and freely movable, said casing being provided with open ends and havinga slot in its side, a sleeve located outside of said tool, a screw orpin passing through said sleeve, a filling' piece secured by said screwto said sleeve, and proj ecting within the perforation in the side ofthe casing, and a spring confined in said casing between the end thereofand said sleeve, substantially as described.

2. The combination of a power driven tool, and a shock absorber carriedthereby, said absorber consisting of a hollow casing provided at one endwith an internal shoulder, said casing having an elongated slot in itsside and being open at both ends, a hollow sleeve adapted to surroundthe tool and it within one end of said casing, a filling piece adaptedto project within the slot in the side of said casing, a screw or pinpassing through said filling piece and said sleeve and engaging the toolsupport, and a spring located between said sleeve and one endof saidcasing, substantially as described.

3. The combination of a power driven tool and a shock absorber therefor,said absorber consisting of a casing open at both ends and provided witha shoulder at one end and having' an elongated slot in its side, asleeve adapted to iit within one end of said casing, a removableperforated wedge adapted t-o fit against the shoulder at the other endof said easing, a filling' piece adapted. to project from said sleeveinto the perforation in the side of said casing, and a screw or pinfirmly securing together said filling piece, sleeve and the shank of thetool, substantially as described.

In testimony whereof, I .aihX my signature, in presence of twowitnesses.

GUSTAV BANK.

Witnesses ALONZO R. GLARKsoN, ALFRED GILLIS.

